When using a native VPN protocol please make sure that your VPN protocol software supports the Internet protocol IPv6 along with IPv4 or run an IPv4 Internet connection only. Many Internet Service Providers connect with the IPv6 protocol or offer both protocols, IPv4 and IPv6, at the same time and as long as a native VPN protocol doesn't support IPv6 you risk data leaks, since an IPv6 connection can bypass the tunneled IPv4 connection. While the CyberGhost client does support IPv6 and therefor prevents IPv6 leaks, users of native VPN protocols on a router need to deactivate the Internet protocol IPv6 manually in the respective router's Internet settings.

Disclaimer: Please keep in mind that, although the technical process is as thoroughly documented as possible, you need to have at least some technical understanding. There's always a chance for an overseen mistake and/or things have changed and the article is not updated yet.

Some general notes on routers:

Routers are usually not equipped with state of the art hardware, meaning you will have speed losses when using a VPN connection (due to low CPU power to process encryption). Direct connections from your PC, Laptop, Tablet, etc. to the VPN network (without the router providing the VPN software) will work better for you, if speed is among your favorite desires.

If your flashed router doesn't provide DSL functionality, your Internet connection will still need to be managed by your DSL modem. In that case your device pool will hook on your router (via cable or wireless) and the router itself will be hooked to your DSL modem. So don’t forget to configure your WLAN devices to connect to the new router, so they won’t log in to the old WLAN. Alternatively you can deactivate your modem’s WLAN completely (only if you don’t need it for unencrypted traffic).

If you flash your router with an alternative firmware you might lose your device’s guarantee; please consult your dealers’ policies regarding this matter. Furthermore it might happen that the flash process leaves your device unusable, e.g. after a power failure while flashing. CyberGhost is not to be held responsible for any damages, does not acknowledge any liabilities and will not adopt your manufacturer’s warranty.

Also please note that not all routers with VPN client support will be able to connect to the CyberGhost network or might loose that ability with future firmware updates.

In the list of Operating Systems you can CyberGhost use with, please click on 'Other' to be able to setup all necessary options for the OpenVPN protocol. When done the screen extends and gives way to 'Create new credentials'. Do it by clicking on the respective button.

Scroll up the page. As you see, the placeholder for a new device is now replaced by 'Linux, Router, etc.'. Click on that button:

Type a name for your new device and activate the wanted extra features, provided with each regular subscription:

Scroll down and generate the login and configuration data for the OpenVPN protocol:

Protocol: Choose the OpenVPN protocol you want to use:OpenVPN (UDP): UDP allows higher speed than the TCP version, but can result in broken downloads in some cases. This is the default setting.OpenVPN (TCP): TCP allows more stable connections than the UDP version, but is a bit slower. Choose this version, if you have recurrent connection issues such as sudden disconnections.

Country: Since native protocol connections may only be used with exactly one server you now have to choose the country you want to surf from; the server to be used in this country will be chosen by CyberGhost automatically. (If you want or need different PPTP, L2TP or OpenVPN connections in different countries, repeat all steps for every country.)

Server group: Depending on the chosen country as well as the availability of different server types as an attribute of your current plan you can also define a server group to use:Standard and Premium Server: This is the group of all paid service servers of the country chosen. Subscribers of a Special Edition with limited access can't use regular Premium servers.NoSpy Server: This is the group of all exclusive NoSpy servers of the country chosen. These servers can only be accessed by those subscribers, who opt for them as an additional feature

After setting up your connection wishes please note down the following data sets. You will need them to configure your device:

Server: This is the address of the country (server) you want to be connected with, e.g. '1-ro.cg-dialup.net'. Note: This address changes with every country you have chosen in the step before. The actual single server to be used will be chosen automatically by CyberGhost.

Password: A solely for protocol usage generated password. This is NOT your regular CyberGhost account password.

Once done, please download the configuration file. For that please click on 'Download Configuration' and save the file on your computer. It's a ZIP file, which contains the following single configuration files:

ca.crt: This is the certificate of the certification authority

client.crt: This is the user certification file

client.key: This is your private key file

openvpn.ovpn: This is your OpenVPN configuration file

If you need to change the country to surf from, you must re-configure the location to use in your account management and download the new config file.

Step 2

Open your TomatoUSB router’s configuration page and click on the left side on ‚VPN Tunneling‘ and right after that on ‚OpenVPN Client‘

Basic

Activate the main tab ‚Client 1‘ and the sub tab ‚Basic‘. Check all of the following options and change those which show different:

Start with WAN: Please deactivate

Interface Type: TUN

Protocol: UDP or TCP (depending on what type you decided to use in step 1)

Server Address/Port: Address: 4-ro.cg-dialup.net / Port: 443. Depending on the country to connect with, the second block of each address will be exchanged, e.g. instead '4-de.cg-dialup.net‘ (for Germany with Standard Server Group) '4-ro.cg-dialup.net‘ (for Romania with Standard Server Group). When configuring location and server group, the complete and proper address will be generated automatically for you. It includes encrypted information about your plan, the country, the server group chosen and the domain name; the protocol to be used will be detected automatically when connecting to CyberGhost.

Firewall: Automatic

Authorization Mode: TLS

Username/Password Authentication: Please activate

Username: The user name created in step 1. DO NOT user your regular user name!

Password: The password created in step 1. DO NOT user your regular password!

Username Authentication only: Please deactivate

Extra HMAC authorization: Disabled

Create NAT on tunnel: Please activate

Opening 'Basic > Network' you can also configure the DNS server to be used. If you want to, please exchange the first DNS IP address with a censorship-free CyberGhost name server:

Primary: 38.132.106.139 (located in USA)

Secondary: 194.187.251.67 (located in UK)

Also take care of the correct configuration of time zone and server in the tab 'Basic > Time'.

Advanced

After activating the tab ‚Advanced‘ please check the following options:

Poll Interval: 0 (deactivated)

Redirect Internet traffic: Please activate

Accept DNS configuration: Relaxed

Encryption cypher: AES-256-CBC

Compression: Enabled

TLS Renegotiation Time: -1

Connection retry: 30

Verify server certificate: Please deactivate

Custom Configuration: Here you mark all existing lines, delete them and exchange them with some parts of your downloaded 'openvpn.ovpn' configuration file: For that open the OpenVPN file with a simple text editor, mark the text beginning with 'resolve-retry infinete' and ending with 'comp-lzo' (including both lines), copy the text with 'Control-C' and insert it here with 'Control-V'. It should look like this:

Please don’t copy this example for a server configuration might change after publishing this article.

Keys

Now switch to the tab ‚Keys‘. There you find three fields, which have to be filled with the corresponding content of the other three files you downloaded from your CyberGhost account management. For that you also open the respective file with a simple editor and copy the respective text passages: